Trifluoroalkoxy-substituted anilides and germicidal compositions obtained therewith



lfib ltisiil 3,142,703 TRIFLUOROALKOXY SUBSTITUTED ANI- LIDES AND GERMICIDAL COMPOSITIONS OBTAINED THEREWITH Herbert C. Stecker, 113 Hollywood Ave., Hohokus, NJ. N Drawing. Filed Apr. 20, 1962, Ser. No. 188,942 6 Claims. (Cl. 260-559) are the subject of the present inempirical formula as follows:

where X and X are substituents of the class consisting of hydrogen, --CF R CF O (CH ),,CF and halogen, n is an integer ranging from 1 to 5, R is a radical of the class comprising substituted and unsubstituted alkyl, aryl, alkaryl and aralkyl groups having no more than 12 carbon atoms, and R is an alkyl group having not more than 3 carbon atoms.

Germicidal compounds have been disclosed in the art (e.g., US. Patent 2,703,332 and Brit. Patent 745,607) wherein a trifiuoromethyl substituent has been directly attached to the anilide nucleus. However, such compounds are quite soluble, relatively speaking, so that they are leached out too rapidly when used in textile-treating, paper-treating, plastic-treating, and similar compositions. According to the present invention, strongly germicidal compounds which have more limited solubility, are prepared, such compounds exerting even greater germicidal effect than the prior art salicylanilide compounds, in spite of their low solubility rates.

In the compounds of the present invention, the radicals X and X may be hydrogen, a halogen such as chlorine, bromine, iodine, or fluorine, or -CF -R CF or -O(CH CF The radical R may be a benzyl group or a phenyl group, unsubstituted, or bearing one to three substituents such as NH N0 COONa, -OH, -Cl, Br, I, F, or an alkyl group such as CH C H -C.,H -(CH CH or substituted alkyl group, such as CF3, CHgCl, C H I, and the like. Typical compounds, made in accordance with the present invention, include -fiuoro-3-trifluoromethyl-Z-trifluorornethoxy salicylanilide, 3-trifluoro-methyl 5' trifluoroethoxy salicylanilide, 3'5 bistrifluoromethoXy-3 nitrosalicylanilide, 3-bromo-5'trifluoropropoxy-4amino-benzanilide, 2, 5-bis-trifluoroethoxy-4-iodo-3,5-difluorosalicylanilide, 3- trifluoroethoxy-5chloro-chloroacetanilide, 2,3,5-tristrifluoroethoxy-fluoropropionylanilide, 3 trifluoroethoxy 5'- chloro-3iodosalicylanilide, 2-bromo-3 trifluoromethoxytrifiuoroacetanilide, and the like.

A typical method of preparation of the compounds of the present invention is apparent from the following example:

EXAMPLE 5-Fluor0-3-Trifluoromethyl-6-Triflu0roethoxy Salicylanilide Forty-seven parts by weight of 3-trifluoromethyl-6-tri- 3,142,70 Patented July 28, 1964 fiuoroethoxy-aniline and 31 parts of 5-fluorosalicylic acid are added to 450 parts of chlorobenzene, and 12 parts of phosphorus trichloride are then added with 1 part of aluminum chloride. The mixture is refluxed until hydrogen chloride ceases to be generated, after which water is added, and the mixture is made alkaline with trisodium phosphate. After steam distillation of the chlorobenzene, the product is removed by filtration.

Similar products may be obtained by using, for example, 3,6-bistrifluoroethoxy aniline instead of 3-trifluoromethyl-6-trifluoroethoxy aniline to produce 5-fluoro-3',6- trifluoroethoxy salicylanilide, or using 5-bromo-salicylic acid, instead of S-fluorosalicylic acid, for example, to produce 5-bromo-3-trifluoromethyl-6'-trifluoroethoxy salicylanilide.

Table I lists a number of compounds prepared in accordance with the process outlined above, and gives their solubilities and microbial inhibiting power in parts per million against S. aureus and S. choleraesuis, the inhibiting power being determined as follows:

Serial dilutions were made with each germicide and each concentration level was tested in triplicate against the designated microorganism in a nutrient broth medium to determine the minimum concentration required to inhibit growth of the microorganism. The presence or absence of growth was determined by the development of a haze or cloud in the otherwise clear growth medium and no attempt was made to determine whether the microorganism was killed or merely inhibited in its growth.

These compounds have been found to be excellent mildew-proofing and germicidalagents for fibrous materials such as cloth, leather, paper, wood, and the like. Treatment of the fibrous material may be made with aLSolution or dispersion of the g "do inaliguid mediurmleaving about 0.001% Y6 or'0;'1"% or even 0.5 or as much as 5.0% by weight of germicide in the fibrous material.

The germicides of the present invention also may be incorporated in plastics, such as rubber, polyethylene, polystyrene, polyurethane, nylon, and similar plastoform and elastoform compositions by incorporating the germicide in an amount of 0.001% to 0.05% or even 0.1% or as much as 0.5% and 5.0% in the batch which is mixed or kneaded prior to vulcanization, extrusion or other forming operation.

The compounds of the present invention are particularly valuable in detergent and toilet detergent compositions, in the amount of 0.001% to 0.01% by weight and to about 0.5% or even 1.0%, 2%, 5%, or even 10%. They may beiad-rniged in commercial toilet soaps, such as the neutral high grade sodium and potassium salts of fatty acids from tallow, olive oil, palm oil, and the like, above or with non-soap synthetic detergents, e.g., non-ionic, anionic, or cationic.

The term detergent employed herein includes fatty acid soaps, as well as synthetic detergents, and other detergents, such as fatty alcohol sulfates, fatty acid amides, sodium tripolyphosphates, and combinations thereof. The term toilet soap used herein also is employed in its popular meaning, that is, those compositions employed for cleansing the skin and prepared from an alkaline metal product, such as potassium or sodium hydroxide and a fat or fatty acid, both saturated and unsaturated. The compositions described herein also include other antiseptic agents, emollients, water softeners, antioxidants, dyes, perfume, cold cream additives, and the like.

The germicidal compounds of the present inventionl...

monium dihydrogen phosphate, or with non-ionic deter- I gents, such as polyoxypropylene polyoxyethylene condensates, alone or in admixture With other detergents heretofore enumerated. They are also effective in scouring powders, detergent cleaners, and the like.

TABLE I Compound 0 01120 F (1)11 Br OCHzCF on I H I V NI-IC-CHz-OO 0 OH I OCHzCFs Br l O I O CHzC Fa OCHzCFs CFsCH2O OCHzOFa CFaCHgO OH C O I I l C FaCHzO 3 wherein:

X and X are members of the class consisting of hydrogen, CF R CF O(CH CF and halogen, n is an integer of 1 to 5,

Solubility Antimicrobial Activity (p.p.m.) Against Polyethy- S. aurcus lone Glycol S. choleraesuz's I claim:

1. A compound of the formula:

H II

R is a radical of the class consisting of phenyl, benzyl and alkyl groups, having not more than 12 carbon 70 atoms, and

R is an alkyl group having not more than 3 carbon atoms. 2. S-halo-3'-trifluoro-methyl-Z-trifluoromethoxy salicylanilide. 75 3. 3'-trifluoromethyl-S'-trifiuoroethoxy salicylanilide.

5 6 4. 2,5-bistrifluoromethoxy-4'-diha1o salicylanilides. 2,965,575 Beaver et a1 Dec. 20, 1960 5. 3-trifluoroethoxy-S-halo-chlorace'tanilide. 3,021,368 Blank et a1. Feb. 13, 1962 6. 3-halo-3'-trifluoroethoxy-5'-ha1o salicylanilide. 3,041,187 Jordan et a1 June 26, 1962 3,058,881 Wilde Oct. 16, 1962 References Cited in the file of this patent 5 UNITED STATES PATENTS FOREIQITI PATENTS 2 172 9 Clayton et 1 Sept 12 1939 770,411 Great Blltaln Mar. 20, 1957 2,703,332 Bindler et a1 Mar. 1, 1955 2,727,007 Little et a1. Dec. 13, 1955 10 OTHER REFERENCES 2,752,393 Martin June 26, 1956 Yagupolskii et al.: Chemical Abstracts, v01. 50, page 2,893,881 Sakornbut July 7, 1959 13,793 (1956), QDl A51. 2,901,508 Korman Aug. 25, 1959 Yagupolskii et a1.: Chem. Abstracts, vol. 47, page 4771 2,921,961 Muller et a1 Ian. 19, 1960 (1953), QD1 A51. 

1. A COMPOUND OF THE FORMULA: 